Electric kettle



FIG. 1 is a front, top, and left side perspective view of an electric kettle,

FIG. 2 is a front elevation view thereof,

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof,

FIG. 5 is a right side elevation view thereof; and,

FIG. 6 is a left side elevation view thereof.

The broken lines shown in the drawings represent portions of the electric kettle and form no part of the claimed design. 

CLAIM The ornamental design for an electric kettle, as shown and described. 